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Discussion Starter #1
i have a rattle under the car. it is not tied to the engine revs. the dealer says it is a loose left rear catalyst.

does this make sense?

the repair will be $1200. does this sound right?

also, do i need to fix it for mechanicl or performance reasons?
 

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yes that sounds right. it doesnt always rattle just cause you rev it or drive it. it can cause drivabilty problems by clogging up the exhaust then you will have misfires and will run very poorly.
 
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